Did Miao Dao become the standard weapon of any era? Can I use it as a shield?

Miao Dao was only used as a standard weapon in Ming dynasty, and there was not much equipment. The main reason is the complex forging process and high cost. The general army is equipped with one-handed knives such as Yanling knives.

Infantry with shields generally don't need Miao Dao, but generally have a 20-kg broadsword. When fighting, fight in array, advance at a fixed pace, use a big shield to resist the opponent's attack, then slash with a heavy knife, immediately return after an attack, and raise the shield again. The blade of Miao Dao is too thin and light, which is not suitable for heavy knife chopping.